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5. Huge
<a href=http://www.hugeinc.com>Huge</a>
Year founded: 1999
Staff: 300
The full-service interactive agency helps build digital platforms for businesses like Target (TGT), Mattel (MAT), Jet Blue (JBLU), and Time Inc. (part of Time Warner and parent of Fortune). The mission? Design web user experiences that aren't just attractive but clean and easy to use. At the outset the company started with 10 staffers. Now, it claims 300 employees spread across offices in Los Angeles, London, Stockholm, Singapore, and Rio de Janeiro, one-third of whom were hired in the last year alone. According to the company, its projects have generated over $12.3 billion in revenue and are visited by more than 150 million people each month. Michal Pasternak, a partner and head of the user experience division, attributes the company's recent rapid growth to the shift in ad and marketing dollars.

"People are checking out the website online before they go to the store," says Pasternak, who is currently working on revamping Target's website for a relaunch next year. As a result the company found in a client study that the odds of potential buyers making a purchase climb significantly if they visit the store's site first -- in IKEA's case, the likelihood jumped 42%. For the agency, that can only be viewed as, well, a huge opportunity.

NEXT: In8Mobile
Last updated December 06 2010: 10:54 AM ET
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